code: def kernel_pdf_bs(x, sample, bw):
      # Birnbaum Saunders (normal) kernel for density, pdf, estimation
      return stats.fatiguelife.pdf(sample, bw, scale=x)
  
imports: import numpy
  from scipy import special, stats
label_desc: Use image node_id 21 for calling a global function with example usage: kernel_pdf_bs(x, sample, bw) and returns: stats